Tanning tub



FIG. 1 is a perspective view of a tanning tub, showing my new design, the broken line showing of a sun bather is for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is a top view thereof;

FIG. 3 is a cross-section taken along the lines 2--2 of FIG. 2;

FIG. 4 is a side view thereof;

FIG. 5 is front view thereof;

FIG. 6 is back view thereof;

FIG. 7 is another side view thereof with the back rest position raised from that of FIG. 4; and,

FIG. 8 is bottom view thereof. 

The ornamental design for a tanning tub, as shown and described. 